fix: let a plugin move a single message that is not in the open list

lib/__tests__/plugin-host-mail-move.test.ts

@@ -81,6 +81,18 @@ describe('api.email.move and archive', () => {
     expect(moveEmail).not.toHaveBeenCalled();
   });
 
+  // An auto-filer moves new mail while the user looks at another folder.
+  it('moves a single message that is not in the open list', async () => {
+    const batchMoveEmails = vi.fn(async () => {});
+    const moveEmail = vi.fn(async () => {});
+    useAuthStore.setState({ client: { batchMoveEmails, moveEmail } as unknown as IJMAPClient });
+    useEmailStore.setState({ moveEmailsToMailbox: storeMove, emails: [] } as never);
+
+    await call(WRITER, 'email.move', ['m9'], 'arch');
+
+    expect([...batchMoveEmails.mock.calls, ...moveEmail.mock.calls]).toEqual([[['m9'], 'arch', undefined]]);
+  });
+
   it('says when there is no Archive folder', async () => {
     useEmailStore.setState({ mailboxes: [inbox] });
     await expect(call(WRITER, 'email.archive', ['m1'])).rejects.toThrow(/no Archive folder/);

stores/email-store.ts

@@ -4214,7 +4214,9 @@ export const useEmailStore = create<EmailStore>((set, get) => ({
       }
       return true;
     }
-    if (emailIds.length === 1) {
+    // moveToMailbox acts on a listed row only; an id from elsewhere (a
+    // plugin moving new mail) takes the batch path, or it was dropped.
+    if (emailIds.length === 1 && get().emails.some(e => e.id === emailIds[0])) {
       return await get().moveToMailbox(client, emailIds[0], destinationMailboxId);
     }